2 * WPA Supplicant / dbus-based control interface
3 * Copyright (c) 2006, Dan Williams <dcbw@redhat.com> and Red Hat, Inc.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
20 #include "wpa_supplicant_i.h"
21 #include "drivers/driver.h"
23 #include "ctrl_iface_dbus.h"
24 #include "ctrl_iface_dbus_handlers.h"
26 #define _DBUS_VERSION (DBUS_VERSION_MAJOR << 8 | DBUS_VERSION_MINOR)
27 #define DBUS_VER(major, minor) ((major) << 8 | (minor))
29 #if _DBUS_VERSION < DBUS_VER(1,1)
30 #define dbus_watch_get_unix_fd dbus_watch_get_fd
34 struct ctrl_iface_dbus_priv {
37 struct wpa_global *global;
43 static void process_watch(struct ctrl_iface_dbus_priv *iface,
44 DBusWatch *watch, eloop_event_type type)
46 dbus_connection_ref(iface->con);
48 iface->should_dispatch = 0;
50 if (type == EVENT_TYPE_READ)
51 dbus_watch_handle(watch, DBUS_WATCH_READABLE);
52 else if (type == EVENT_TYPE_WRITE)
53 dbus_watch_handle(watch, DBUS_WATCH_WRITABLE);
54 else if (type == EVENT_TYPE_EXCEPTION)
55 dbus_watch_handle(watch, DBUS_WATCH_ERROR);
57 if (iface->should_dispatch) {
58 while (dbus_connection_get_dispatch_status(iface->con) ==
59 DBUS_DISPATCH_DATA_REMAINS)
60 dbus_connection_dispatch(iface->con);
61 iface->should_dispatch = 0;
64 dbus_connection_unref(iface->con);
68 static void process_watch_exception(int sock, void *eloop_ctx, void *sock_ctx)
70 process_watch(eloop_ctx, sock_ctx, EVENT_TYPE_EXCEPTION);
74 static void process_watch_read(int sock, void *eloop_ctx, void *sock_ctx)
76 process_watch(eloop_ctx, sock_ctx, EVENT_TYPE_READ);
80 static void process_watch_write(int sock, void *eloop_ctx, void *sock_ctx)
82 process_watch(eloop_ctx, sock_ctx, EVENT_TYPE_WRITE);
86 static void connection_setup_add_watch(struct ctrl_iface_dbus_priv *iface,
92 if (!dbus_watch_get_enabled(watch))
95 flags = dbus_watch_get_flags(watch);
96 fd = dbus_watch_get_unix_fd(watch);
98 eloop_register_sock(fd, EVENT_TYPE_EXCEPTION, process_watch_exception,
101 if (flags & DBUS_WATCH_READABLE) {
102 eloop_register_sock(fd, EVENT_TYPE_READ, process_watch_read,
105 if (flags & DBUS_WATCH_WRITABLE) {
106 eloop_register_sock(fd, EVENT_TYPE_WRITE, process_watch_write,
110 dbus_watch_set_data(watch, iface, NULL);
114 static void connection_setup_remove_watch(struct ctrl_iface_dbus_priv *iface,
120 flags = dbus_watch_get_flags(watch);
121 fd = dbus_watch_get_unix_fd(watch);
123 eloop_unregister_sock(fd, EVENT_TYPE_EXCEPTION);
125 if (flags & DBUS_WATCH_READABLE)
126 eloop_unregister_sock(fd, EVENT_TYPE_READ);
127 if (flags & DBUS_WATCH_WRITABLE)
128 eloop_unregister_sock(fd, EVENT_TYPE_WRITE);
130 dbus_watch_set_data(watch, NULL, NULL);
134 static dbus_bool_t add_watch(DBusWatch *watch, void *data)
136 connection_setup_add_watch(data, watch);
141 static void remove_watch(DBusWatch *watch, void *data)
143 connection_setup_remove_watch(data, watch);
147 static void watch_toggled(DBusWatch *watch, void *data)
149 if (dbus_watch_get_enabled(watch))
150 add_watch(watch, data);
152 remove_watch(watch, data);
156 static void process_timeout(void *eloop_ctx, void *sock_ctx)
158 DBusTimeout *timeout = sock_ctx;
160 dbus_timeout_handle(timeout);
164 static void connection_setup_add_timeout(struct ctrl_iface_dbus_priv *iface,
165 DBusTimeout *timeout)
167 if (!dbus_timeout_get_enabled(timeout))
170 eloop_register_timeout(0, dbus_timeout_get_interval(timeout) * 1000,
171 process_timeout, iface, timeout);
173 dbus_timeout_set_data(timeout, iface, NULL);
177 static void connection_setup_remove_timeout(struct ctrl_iface_dbus_priv *iface,
178 DBusTimeout *timeout)
180 eloop_cancel_timeout(process_timeout, iface, timeout);
181 dbus_timeout_set_data(timeout, NULL, NULL);
185 static dbus_bool_t add_timeout(DBusTimeout *timeout, void *data)
187 if (!dbus_timeout_get_enabled(timeout))
190 connection_setup_add_timeout(data, timeout);
196 static void remove_timeout(DBusTimeout *timeout, void *data)
198 connection_setup_remove_timeout(data, timeout);
202 static void timeout_toggled(DBusTimeout *timeout, void *data)
204 if (dbus_timeout_get_enabled(timeout))
205 add_timeout(timeout, data);
207 remove_timeout(timeout, data);
211 static void process_wakeup_main(int sig, void *eloop_ctx, void *signal_ctx)
213 struct ctrl_iface_dbus_priv *iface = signal_ctx;
215 if (sig != SIGPOLL || !iface->con)
218 if (dbus_connection_get_dispatch_status(iface->con) !=
219 DBUS_DISPATCH_DATA_REMAINS)
222 /* Only dispatch once - we do not want to starve other events */
223 dbus_connection_ref(iface->con);
224 dbus_connection_dispatch(iface->con);
225 dbus_connection_unref(iface->con);
230 * wakeup_main - Attempt to wake our mainloop up
231 * @data: dbus control interface private data
233 * Try to wake up the main eloop so it will process
234 * dbus events that may have happened.
236 static void wakeup_main(void *data)
238 struct ctrl_iface_dbus_priv *iface = data;
240 /* Use SIGPOLL to break out of the eloop select() */
242 iface->should_dispatch = 1;
247 * connection_setup_wakeup_main - Tell dbus about our wakeup_main function
248 * @iface: dbus control interface private data
249 * Returns: 0 on success, -1 on failure
251 * Register our wakeup_main handler with dbus
253 static int connection_setup_wakeup_main(struct ctrl_iface_dbus_priv *iface)
255 if (eloop_register_signal(SIGPOLL, process_wakeup_main, iface))
258 dbus_connection_set_wakeup_main_function(iface->con, wakeup_main,
266 * wpa_supplicant_dbus_next_objid - Return next available object id
267 * @iface: dbus control interface private data
270 u32 wpa_supplicant_dbus_next_objid (struct ctrl_iface_dbus_priv *iface)
272 return iface->next_objid++;
277 * wpas_dbus_decompose_object_path - Decompose an interface object path into parts
278 * @path: The dbus object path
279 * @network: (out) the configured network this object path refers to, if any
280 * @bssid: (out) the scanned bssid this object path refers to, if any
281 * Returns: The object path of the network interface this path refers to
283 * For a given object path, decomposes the object path into object id, network,
284 * and BSSID parts, if those parts exist.
286 char * wpas_dbus_decompose_object_path(const char *path, char **network,
289 const unsigned int dev_path_prefix_len =
290 strlen(WPAS_DBUS_PATH_INTERFACES "/");
294 /* Be a bit paranoid about path */
295 if (!path || strncmp(path, WPAS_DBUS_PATH_INTERFACES "/",
296 dev_path_prefix_len))
299 /* Ensure there's something at the end of the path */
300 if ((path + dev_path_prefix_len)[0] == '\0')
303 obj_path_only = strdup(path);
304 if (obj_path_only == NULL)
307 next_sep = strchr(obj_path_only + dev_path_prefix_len, '/');
308 if (next_sep != NULL) {
309 const char *net_part = strstr(next_sep,
310 WPAS_DBUS_NETWORKS_PART "/");
311 const char *bssid_part = strstr(next_sep,
312 WPAS_DBUS_BSSIDS_PART "/");
314 if (network && net_part) {
315 /* Deal with a request for a configured network */
316 const char *net_name = net_part +
317 strlen(WPAS_DBUS_NETWORKS_PART "/");
319 if (strlen(net_name))
320 *network = strdup(net_name);
321 } else if (bssid && bssid_part) {
322 /* Deal with a request for a scanned BSSID */
323 const char *bssid_name = bssid_part +
324 strlen(WPAS_DBUS_BSSIDS_PART "/");
325 if (strlen(bssid_name))
326 *bssid = strdup(bssid_name);
331 /* Cut off interface object path before "/" */
335 return obj_path_only;
340 * wpas_dbus_new_invalid_iface_error - Return a new invalid interface error message
341 * @message: Pointer to incoming dbus message this error refers to
342 * Returns: A dbus error message
344 * Convenience function to create and return an invalid interface error
346 DBusMessage * wpas_dbus_new_invalid_iface_error(DBusMessage *message)
348 return dbus_message_new_error(message, WPAS_ERROR_INVALID_IFACE,
349 "wpa_supplicant knows nothing about "
355 * wpas_dbus_new_invalid_network_error - Return a new invalid network error message
356 * @message: Pointer to incoming dbus message this error refers to
357 * Returns: a dbus error message
359 * Convenience function to create and return an invalid network error
361 DBusMessage * wpas_dbus_new_invalid_network_error(DBusMessage *message)
363 return dbus_message_new_error(message, WPAS_ERROR_INVALID_NETWORK,
364 "The requested network does not exist.");
369 * wpas_dbus_new_invalid_bssid_error - Return a new invalid bssid error message
370 * @message: Pointer to incoming dbus message this error refers to
371 * Returns: a dbus error message
373 * Convenience function to create and return an invalid bssid error
375 static DBusMessage * wpas_dbus_new_invalid_bssid_error(DBusMessage *message)
377 return dbus_message_new_error(message, WPAS_ERROR_INVALID_BSSID,
378 "The BSSID requested was invalid.");
383 * wpas_dispatch_network_method - dispatch messages for configured networks
384 * @message: the incoming dbus message
385 * @wpa_s: a network interface's data
386 * @network_id: id of the configured network we're interested in
387 * Returns: a reply dbus message, or a dbus error message
389 * This function dispatches all incoming dbus messages for configured networks.
391 static DBusMessage * wpas_dispatch_network_method(DBusMessage *message,
392 struct wpa_supplicant *wpa_s,
395 DBusMessage *reply = NULL;
396 const char *method = dbus_message_get_member(message);
397 struct wpa_ssid *ssid;
399 ssid = wpa_config_get_network(wpa_s->conf, network_id);
401 return wpas_dbus_new_invalid_network_error(message);
403 if (!strcmp(method, "set"))
404 reply = wpas_dbus_iface_set_network(message, wpa_s, ssid);
405 else if (!strcmp(method, "enable"))
406 reply = wpas_dbus_iface_enable_network(message, wpa_s, ssid);
407 else if (!strcmp(method, "disable"))
408 reply = wpas_dbus_iface_disable_network(message, wpa_s, ssid);
415 * wpas_dispatch_bssid_method - dispatch messages for scanned networks
416 * @message: the incoming dbus message
417 * @wpa_s: a network interface's data
418 * @bssid: bssid of the scanned network we're interested in
419 * Returns: a reply dbus message, or a dbus error message
421 * This function dispatches all incoming dbus messages for scanned networks.
423 static DBusMessage * wpas_dispatch_bssid_method(DBusMessage *message,
424 struct wpa_supplicant *wpa_s,
427 DBusMessage *reply = NULL;
428 const char *method = dbus_message_get_member(message);
429 struct wpa_scan_res *res = NULL;
432 /* Ensure we actually have scan data */
433 if (wpa_s->scan_res == NULL &&
434 wpa_supplicant_get_scan_results(wpa_s) < 0) {
435 reply = wpas_dbus_new_invalid_bssid_error(message);
439 /* Find the bssid's scan data */
440 for (i = 0; i < wpa_s->scan_res->num; i++) {
441 struct wpa_scan_res *search_res = wpa_s->scan_res->res[i];
444 memset(mac_str, 0, sizeof(mac_str));
445 snprintf(mac_str, sizeof(mac_str) - 1, WPAS_DBUS_BSSID_FORMAT,
446 MAC2STR(search_res->bssid));
447 if (!strcmp(bssid, mac_str)) {
454 reply = wpas_dbus_new_invalid_bssid_error(message);
458 /* Dispatch the method call against the scanned bssid */
459 if (!strcmp(method, "properties"))
460 reply = wpas_dbus_bssid_properties(message, wpa_s, res);
468 * wpas_iface_message_handler - Dispatch messages for interfaces or networks
469 * @connection: Connection to the system message bus
470 * @message: An incoming dbus message
471 * @user_data: A pointer to a dbus control interface data structure
472 * Returns: Whether or not the message was handled
474 * This function dispatches all incoming dbus messages for network interfaces,
475 * or objects owned by them, such as scanned BSSIDs and configured networks.
477 static DBusHandlerResult wpas_iface_message_handler(DBusConnection *connection,
478 DBusMessage *message,
481 struct wpa_supplicant *wpa_s = user_data;
482 const char *method = dbus_message_get_member(message);
483 const char *path = dbus_message_get_path(message);
484 const char *msg_interface = dbus_message_get_interface(message);
485 char *iface_obj_path = NULL;
486 char *network = NULL;
488 DBusMessage *reply = NULL;
490 /* Caller must specify a message interface */
494 iface_obj_path = wpas_dbus_decompose_object_path(path, &network,
496 if (iface_obj_path == NULL) {
497 reply = wpas_dbus_new_invalid_iface_error(message);
501 /* Make sure the message's object path actually refers to the
502 * wpa_supplicant structure it's supposed to (which is wpa_s)
504 if (wpa_supplicant_get_iface_by_dbus_path(wpa_s->global,
505 iface_obj_path) != wpa_s) {
506 reply = wpas_dbus_new_invalid_iface_error(message);
510 if (network && !strcmp(msg_interface, WPAS_DBUS_IFACE_NETWORK)) {
511 /* A method for one of this interface's configured networks */
512 int nid = strtoul(network, NULL, 10);
514 reply = wpas_dispatch_network_method(message, wpa_s,
517 reply = wpas_dbus_new_invalid_network_error(message);
518 } else if (bssid && !strcmp(msg_interface, WPAS_DBUS_IFACE_BSSID)) {
519 /* A method for one of this interface's scanned BSSIDs */
520 reply = wpas_dispatch_bssid_method(message, wpa_s, bssid);
521 } else if (!strcmp(msg_interface, WPAS_DBUS_IFACE_INTERFACE)) {
522 /* A method for an interface only. */
523 if (!strcmp(method, "scan"))
524 reply = wpas_dbus_iface_scan(message, wpa_s);
525 else if (!strcmp(method, "scanResults"))
526 reply = wpas_dbus_iface_scan_results(message, wpa_s);
527 else if (!strcmp(method, "addNetwork"))
528 reply = wpas_dbus_iface_add_network(message, wpa_s);
529 else if (!strcmp(method, "removeNetwork"))
530 reply = wpas_dbus_iface_remove_network(message, wpa_s);
531 else if (!strcmp(method, "selectNetwork"))
532 reply = wpas_dbus_iface_select_network(message, wpa_s);
533 else if (!strcmp(method, "capabilities"))
534 reply = wpas_dbus_iface_capabilities(message, wpa_s);
535 else if (!strcmp(method, "disconnect"))
536 reply = wpas_dbus_iface_disconnect(message, wpa_s);
537 else if (!strcmp(method, "setAPScan"))
538 reply = wpas_dbus_iface_set_ap_scan(message, wpa_s);
539 else if (!strcmp(method, "setSmartcardModules"))
540 reply = wpas_dbus_iface_set_smartcard_modules(message,
542 else if (!strcmp(method, "state"))
543 reply = wpas_dbus_iface_get_state(message, wpa_s);
544 else if (!strcmp(method, "setBlobs"))
545 reply = wpas_dbus_iface_set_blobs(message, wpa_s);
546 else if (!strcmp(method, "removeBlobs"))
547 reply = wpas_dbus_iface_remove_blobs(message, wpa_s);
549 else if (!os_strcmp(method, "wpsPbc"))
550 reply = wpas_dbus_iface_wps_pbc(message, wpa_s);
551 else if (!os_strcmp(method, "wpsPin"))
552 reply = wpas_dbus_iface_wps_pin(message, wpa_s);
553 else if (!os_strcmp(method, "wpsReg"))
554 reply = wpas_dbus_iface_wps_reg(message, wpa_s);
555 #endif /* CONFIG_WPS */
558 /* If the message was handled, send back the reply */
560 if (!dbus_message_get_no_reply(message))
561 dbus_connection_send(connection, reply, NULL);
562 dbus_message_unref(reply);
566 free(iface_obj_path);
569 return reply ? DBUS_HANDLER_RESULT_HANDLED :
570 DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
575 * wpas_message_handler - dispatch incoming dbus messages
576 * @connection: connection to the system message bus
577 * @message: an incoming dbus message
578 * @user_data: a pointer to a dbus control interface data structure
579 * Returns: whether or not the message was handled
581 * This function dispatches all incoming dbus messages to the correct
582 * handlers, depending on what the message's target object path is,
583 * and what the method call is.
585 static DBusHandlerResult wpas_message_handler(DBusConnection *connection,
586 DBusMessage *message, void *user_data)
588 struct ctrl_iface_dbus_priv *ctrl_iface = user_data;
591 const char *msg_interface;
592 DBusMessage *reply = NULL;
594 method = dbus_message_get_member(message);
595 path = dbus_message_get_path(message);
596 msg_interface = dbus_message_get_interface(message);
597 if (!method || !path || !ctrl_iface || !msg_interface)
598 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
600 /* Validate the method interface */
601 if (strcmp(msg_interface, WPAS_DBUS_INTERFACE) != 0)
602 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
604 if (!strcmp(path, WPAS_DBUS_PATH)) {
605 /* dispatch methods against our global dbus interface here */
606 if (!strcmp(method, "addInterface")) {
607 reply = wpas_dbus_global_add_interface(
608 message, ctrl_iface->global);
609 } else if (!strcmp(method, "removeInterface")) {
610 reply = wpas_dbus_global_remove_interface(
611 message, ctrl_iface->global);
612 } else if (!strcmp(method, "getInterface")) {
613 reply = wpas_dbus_global_get_interface(
614 message, ctrl_iface->global);
615 } else if (!strcmp(method, "setDebugParams")) {
616 reply = wpas_dbus_global_set_debugparams(
617 message, ctrl_iface->global);
621 /* If the message was handled, send back the reply */
623 if (!dbus_message_get_no_reply(message))
624 dbus_connection_send(connection, reply, NULL);
625 dbus_message_unref(reply);
628 return reply ? DBUS_HANDLER_RESULT_HANDLED :
629 DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
634 * wpa_supplicant_dbus_notify_scan_results - Send a scan results signal
635 * @wpa_s: %wpa_supplicant network interface data
636 * Returns: 0 on success, -1 on failure
638 * Notify listeners that this interface has updated scan results.
640 void wpa_supplicant_dbus_notify_scan_results(struct wpa_supplicant *wpa_s)
642 struct ctrl_iface_dbus_priv *iface = wpa_s->global->dbus_ctrl_iface;
643 DBusMessage *_signal;
646 /* Do nothing if the control interface is not turned on */
650 path = wpa_supplicant_get_dbus_path(wpa_s);
652 perror("wpa_supplicant_dbus_notify_scan_results[dbus]: "
653 "interface didn't have a dbus path");
654 wpa_printf(MSG_ERROR,
655 "wpa_supplicant_dbus_notify_scan_results[dbus]: "
656 "interface didn't have a dbus path; can't send "
657 "scan result signal.");
660 _signal = dbus_message_new_signal(path, WPAS_DBUS_IFACE_INTERFACE,
661 "ScanResultsAvailable");
662 if (_signal == NULL) {
663 perror("wpa_supplicant_dbus_notify_scan_results[dbus]: "
664 "couldn't create dbus signal; likely out of memory");
665 wpa_printf(MSG_ERROR, "dbus control interface: not enough "
666 "memory to send scan results signal.");
669 dbus_connection_send(iface->con, _signal, NULL);
670 dbus_message_unref(_signal);
675 * wpa_supplicant_dbus_notify_state_change - Send a state change signal
676 * @wpa_s: %wpa_supplicant network interface data
677 * @new_state: new state wpa_supplicant is entering
678 * @old_state: old state wpa_supplicant is leaving
679 * Returns: 0 on success, -1 on failure
681 * Notify listeners that wpa_supplicant has changed state
683 void wpa_supplicant_dbus_notify_state_change(struct wpa_supplicant *wpa_s,
684 wpa_states new_state,
685 wpa_states old_state)
687 struct ctrl_iface_dbus_priv *iface;
688 DBusMessage *_signal = NULL;
690 const char *new_state_str, *old_state_str;
692 /* Do nothing if the control interface is not turned on */
693 if (wpa_s->global == NULL)
695 iface = wpa_s->global->dbus_ctrl_iface;
699 /* Only send signal if state really changed */
700 if (new_state == old_state)
703 path = wpa_supplicant_get_dbus_path(wpa_s);
705 perror("wpa_supplicant_dbus_notify_state_change[dbus]: "
706 "interface didn't have a dbus path");
707 wpa_printf(MSG_ERROR,
708 "wpa_supplicant_dbus_notify_state_change[dbus]: "
709 "interface didn't have a dbus path; can't send "
713 _signal = dbus_message_new_signal(path, WPAS_DBUS_IFACE_INTERFACE,
715 if (_signal == NULL) {
716 perror("wpa_supplicant_dbus_notify_state_change[dbus]: "
717 "couldn't create dbus signal; likely out of memory");
718 wpa_printf(MSG_ERROR,
719 "wpa_supplicant_dbus_notify_state_change[dbus]: "
720 "couldn't create dbus signal; likely out of "
725 new_state_str = wpa_supplicant_state_txt(new_state);
726 old_state_str = wpa_supplicant_state_txt(old_state);
727 if (new_state_str == NULL || old_state_str == NULL) {
728 perror("wpa_supplicant_dbus_notify_state_change[dbus]: "
729 "couldn't convert state strings");
730 wpa_printf(MSG_ERROR,
731 "wpa_supplicant_dbus_notify_state_change[dbus]: "
732 "couldn't convert state strings.");
736 if (!dbus_message_append_args(_signal,
737 DBUS_TYPE_STRING, &new_state_str,
738 DBUS_TYPE_STRING, &old_state_str,
739 DBUS_TYPE_INVALID)) {
740 perror("wpa_supplicant_dbus_notify_state_change[dbus]: "
741 "not enough memory to construct state change signal.");
742 wpa_printf(MSG_ERROR,
743 "wpa_supplicant_dbus_notify_state_change[dbus]: "
744 "not enough memory to construct state change "
749 dbus_connection_send(iface->con, _signal, NULL);
752 dbus_message_unref(_signal);
757 void wpa_supplicant_dbus_notify_wps_cred(struct wpa_supplicant *wpa_s,
758 const struct wps_credential *cred)
760 struct ctrl_iface_dbus_priv *iface;
761 DBusMessage *_signal = NULL;
764 /* Do nothing if the control interface is not turned on */
765 if (wpa_s->global == NULL)
767 iface = wpa_s->global->dbus_ctrl_iface;
771 path = wpa_supplicant_get_dbus_path(wpa_s);
773 perror("wpa_supplicant_dbus_notify_wps_cred[dbus]: "
774 "interface didn't have a dbus path");
775 wpa_printf(MSG_ERROR,
776 "wpa_supplicant_dbus_notify_wps_cred[dbus]: "
777 "interface didn't have a dbus path; can't send "
781 _signal = dbus_message_new_signal(path, WPAS_DBUS_IFACE_INTERFACE,
783 if (_signal == NULL) {
784 perror("wpa_supplicant_dbus_notify_wps_cred[dbus]: "
785 "couldn't create dbus signal; likely out of memory");
786 wpa_printf(MSG_ERROR,
787 "wpa_supplicant_dbus_notify_wps_cred[dbus]: "
788 "couldn't create dbus signal; likely out of "
793 if (!dbus_message_append_args(_signal,
794 DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE,
795 &cred->cred_attr, cred->cred_attr_len,
796 DBUS_TYPE_INVALID)) {
797 perror("wpa_supplicant_dbus_notify_wps_cred[dbus]: "
798 "not enough memory to construct signal.");
799 wpa_printf(MSG_ERROR,
800 "wpa_supplicant_dbus_notify_wps_cred[dbus]: "
801 "not enough memory to construct signal.");
805 dbus_connection_send(iface->con, _signal, NULL);
808 dbus_message_unref(_signal);
810 #endif /* CONFIG_WPS */
814 * integrate_with_eloop - Register our mainloop integration with dbus
815 * @connection: connection to the system message bus
816 * @iface: a dbus control interface data structure
817 * Returns: 0 on success, -1 on failure
819 * We register our mainloop integration functions with dbus here.
821 static int integrate_with_eloop(DBusConnection *connection,
822 struct ctrl_iface_dbus_priv *iface)
824 if (!dbus_connection_set_watch_functions(connection, add_watch,
825 remove_watch, watch_toggled,
827 perror("dbus_connection_set_watch_functions[dbus]");
828 wpa_printf(MSG_ERROR, "Not enough memory to set up dbus.");
832 if (!dbus_connection_set_timeout_functions(connection, add_timeout,
834 timeout_toggled, iface,
836 perror("dbus_connection_set_timeout_functions[dbus]");
837 wpa_printf(MSG_ERROR, "Not enough memory to set up dbus.");
841 if (connection_setup_wakeup_main(iface) < 0) {
842 perror("connection_setup_wakeup_main[dbus]");
843 wpa_printf(MSG_ERROR, "Could not setup main wakeup function.");
852 * dispatch_initial_dbus_messages - Dispatch initial dbus messages after
854 * @eloop_ctx: the DBusConnection to dispatch on
855 * @timeout_ctx: unused
857 * If clients are quick to notice that wpa_supplicant claimed its bus name,
858 * there may have been messages that came in before initialization was
859 * all finished. Dispatch those here.
861 static void dispatch_initial_dbus_messages(void *eloop_ctx, void *timeout_ctx)
863 DBusConnection *con = eloop_ctx;
865 while (dbus_connection_get_dispatch_status(con) ==
866 DBUS_DISPATCH_DATA_REMAINS)
867 dbus_connection_dispatch(con);
872 * wpa_supplicant_dbus_ctrl_iface_init - Initialize dbus control interface
873 * @global: Pointer to global data from wpa_supplicant_init()
874 * Returns: Pointer to dbus_ctrl_iface date or %NULL on failure
876 * Initialize the dbus control interface and start receiving commands from
877 * external programs over the bus.
879 struct ctrl_iface_dbus_priv *
880 wpa_supplicant_dbus_ctrl_iface_init(struct wpa_global *global)
882 struct ctrl_iface_dbus_priv *iface;
885 DBusObjectPathVTable wpas_vtable = {
886 NULL, &wpas_message_handler, NULL, NULL, NULL, NULL
889 iface = os_zalloc(sizeof(struct ctrl_iface_dbus_priv));
893 iface->global = global;
895 /* Get a reference to the system bus */
896 dbus_error_init(&error);
897 iface->con = dbus_bus_get(DBUS_BUS_SYSTEM, &error);
898 dbus_error_free(&error);
900 perror("dbus_bus_get[ctrl_iface_dbus]");
901 wpa_printf(MSG_ERROR, "Could not acquire the system bus.");
905 /* Tell dbus about our mainloop integration functions */
906 if (integrate_with_eloop(iface->con, iface))
909 /* Register the message handler for the global dbus interface */
910 if (!dbus_connection_register_object_path(iface->con,
911 WPAS_DBUS_PATH, &wpas_vtable,
913 perror("dbus_connection_register_object_path[dbus]");
914 wpa_printf(MSG_ERROR, "Could not set up DBus message "
919 /* Register our service with the message bus */
920 dbus_error_init(&error);
921 switch (dbus_bus_request_name(iface->con, WPAS_DBUS_SERVICE,
923 case DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER:
926 case DBUS_REQUEST_NAME_REPLY_EXISTS:
927 case DBUS_REQUEST_NAME_REPLY_IN_QUEUE:
928 case DBUS_REQUEST_NAME_REPLY_ALREADY_OWNER:
929 perror("dbus_bus_request_name[dbus]");
930 wpa_printf(MSG_ERROR, "Could not request DBus service name: "
931 "already registered.");
934 perror("dbus_bus_request_name[dbus]");
935 wpa_printf(MSG_ERROR, "Could not request DBus service name: "
936 "%s %s.", error.name, error.message);
939 dbus_error_free(&error);
944 wpa_printf(MSG_DEBUG, "Providing DBus service '" WPAS_DBUS_SERVICE
948 * Dispatch initial DBus messages that may have come in since the bus
949 * name was claimed above. Happens when clients are quick to notice the
950 * wpa_supplicant service.
952 * FIXME: is there a better solution to this problem?
954 eloop_register_timeout(0, 50, dispatch_initial_dbus_messages,
960 wpa_supplicant_dbus_ctrl_iface_deinit(iface);
966 * wpa_supplicant_dbus_ctrl_iface_deinit - Deinitialize dbus ctrl interface
967 * @iface: Pointer to dbus private data from
968 * wpa_supplicant_dbus_ctrl_iface_init()
970 * Deinitialize the dbus control interface that was initialized with
971 * wpa_supplicant_dbus_ctrl_iface_init().
973 void wpa_supplicant_dbus_ctrl_iface_deinit(struct ctrl_iface_dbus_priv *iface)
979 eloop_cancel_timeout(dispatch_initial_dbus_messages,
981 dbus_connection_set_watch_functions(iface->con, NULL, NULL,
983 dbus_connection_set_timeout_functions(iface->con, NULL, NULL,
985 dbus_connection_unref(iface->con);
988 memset(iface, 0, sizeof(struct ctrl_iface_dbus_priv));
994 * wpas_dbus_register_new_iface - Register a new interface with dbus
995 * @wpa_s: %wpa_supplicant interface description structure to register
996 * Returns: 0 on success, -1 on error
998 * Registers a new interface with dbus and assigns it a dbus object path.
1000 int wpas_dbus_register_iface(struct wpa_supplicant *wpa_s)
1002 struct ctrl_iface_dbus_priv *ctrl_iface =
1003 wpa_s->global->dbus_ctrl_iface;
1004 DBusConnection * con;
1006 DBusObjectPathVTable vtable = {
1007 NULL, &wpas_iface_message_handler, NULL, NULL, NULL, NULL
1012 /* Do nothing if the control interface is not turned on */
1013 if (ctrl_iface == NULL)
1016 con = ctrl_iface->con;
1017 next = wpa_supplicant_dbus_next_objid(ctrl_iface);
1019 /* Create and set the interface's object path */
1020 path = os_zalloc(WPAS_DBUS_OBJECT_PATH_MAX);
1023 snprintf(path, WPAS_DBUS_OBJECT_PATH_MAX,
1024 WPAS_DBUS_PATH_INTERFACES "/%u",
1026 if (wpa_supplicant_set_dbus_path(wpa_s, path)) {
1027 wpa_printf(MSG_DEBUG,
1028 "Failed to set dbus path for interface %s",
1033 /* Register the message handler for the interface functions */
1034 if (!dbus_connection_register_fallback(con, path, &vtable, wpa_s)) {
1035 perror("wpas_dbus_register_iface [dbus]");
1036 wpa_printf(MSG_ERROR, "Could not set up DBus message "
1037 "handler for interface %s.", wpa_s->ifname);
1049 * wpas_dbus_unregister_iface - Unregister an interface from dbus
1050 * @wpa_s: wpa_supplicant interface structure
1051 * Returns: 0 on success, -1 on failure
1053 * Unregisters the interface with dbus
1055 int wpas_dbus_unregister_iface(struct wpa_supplicant *wpa_s)
1057 struct ctrl_iface_dbus_priv *ctrl_iface;
1058 DBusConnection *con;
1061 /* Do nothing if the control interface is not turned on */
1062 if (wpa_s == NULL || wpa_s->global == NULL)
1064 ctrl_iface = wpa_s->global->dbus_ctrl_iface;
1065 if (ctrl_iface == NULL)
1068 con = ctrl_iface->con;
1069 path = wpa_supplicant_get_dbus_path(wpa_s);
1071 if (!dbus_connection_unregister_object_path(con, path))
1074 free(wpa_s->dbus_path);
1075 wpa_s->dbus_path = NULL;
1082 * wpa_supplicant_get_iface_by_dbus_path - Get a new network interface
1083 * @global: Pointer to global data from wpa_supplicant_init()
1084 * @path: Pointer to a dbus object path representing an interface
1085 * Returns: Pointer to the interface or %NULL if not found
1087 struct wpa_supplicant * wpa_supplicant_get_iface_by_dbus_path(
1088 struct wpa_global *global, const char *path)
1090 struct wpa_supplicant *wpa_s;
1092 for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
1093 if (strcmp(wpa_s->dbus_path, path) == 0)
1101 * wpa_supplicant_set_dbus_path - Assign a dbus path to an interface
1102 * @wpa_s: wpa_supplicant interface structure
1103 * @path: dbus path to set on the interface
1104 * Returns: 0 on succes, -1 on error
1106 int wpa_supplicant_set_dbus_path(struct wpa_supplicant *wpa_s,
1109 u32 len = strlen (path);
1110 if (len >= WPAS_DBUS_OBJECT_PATH_MAX)
1112 if (wpa_s->dbus_path)
1114 wpa_s->dbus_path = strdup(path);
1120 * wpa_supplicant_get_dbus_path - Get an interface's dbus path
1121 * @wpa_s: %wpa_supplicant interface structure
1122 * Returns: Interface's dbus object path, or %NULL on error
1124 const char * wpa_supplicant_get_dbus_path(struct wpa_supplicant *wpa_s)
1126 return wpa_s->dbus_path;